Case for an electronic device



FIG. 1 is a perspective view of a case for an electronic device in accordance with our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines in the drawings depict portions of the case for an electronic device that form no part of the claimed design. 

CLAIM The ornamental design for a case for an electronic device, as shown and described. 